Servo-mechanism for radio controlled model car - has servomotor rack and pinion steering with potentiometer spindle crank coupled to rack for monitoring axial position

摘要

The appts.is used for steering the wheels of a remote controlled vehicle and comprises an electric motor (1) whose shaft is coupled through a reduction gear (2-8) to a steering rod (9) which pivotally interconnects the vehicle wheels. The final pinion (8) of the gear engages a rack (10) on the rod to convert rotational motion of the motor shaft to linear notion of the rod. The axial position of the rod is sensed by a potentiometer (11) coupled to an associated control system. The slider of the potentiometer is driven by the potentiometer spindle (12) arranged at right angles to the steering rod. A cranked extension (13) pref. plastics moulded, is axially secured to the spindle with it crank rod (15) loosely engaging in a slot (16) in an axial flange upstanding on the rod. Movement of the rod rotates the spindle via the crank rod.